is "org.hibernate.engine.EJB3CascadeStyle" an annotation used in your code? It seems that "Hibernate-entitymanager 3.4" only contains "org.hibernate.engine.CascadeStyle". If it is not an annotation used by yourself: which hibernate related JARs do you bundle in your own application?

And which hibernate version is included in JBoss EAP 5.1 (sorry for the question, but I just have access to the community releases)